Cheryl, thank you.
Valerie, thanks for asking that question. I've been wondering a similar thing, but it isn't useless as-is. Even with the bulge at the bottom it cooked an egg just fine on our gas stove top. I thought about making a 15-second movie of an egg sliding around on it. The focus of this forum is collecting. Speaking as a newbie, I doubt this specific skillet had much cred as a collectible even before the bottom warped. I'll wager nothing good happens to that collectibility by reshaping it. If the job were done perfectly it might be more useful on an electric range. Maybe if the question were asked to a forum dedicated to cooking on ceramic cooktops, the answer would be different from asking here. FWIW, the skillet is very light and feels great in the hand; if it could be made more useful that hardly seems like a *bad* thing. I won't be doing anything to reshape it but am still curious.